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Capillary pressure (Pc) curves: pore throat size determination (view source)
Revision as of 20:29, 31 January 2014
, 20:29, 31 January 2014table and math
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| Pore throat size ( ''r'' ) from S<sub>w</sub>
| Pore throat size ( ''r'' ) from S<sub>w</sub>
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# Enter the X-axis at percent pore volume (S<sub>w</sub> value).
# Enter the X-axis at percent pore volume (S<sub>w</sub> value).
# At the intersectionof grid line and P<sub>c</sub> curve, read the corresponding value for ''r'' on the Y-axis
# At the intersectionof grid line and P<sub>c</sub> curve, read the corresponding value for ''r'' on the Y-axis
:<math>\mbox{h} = 200 \mbox{ psi} \times 0.7 = 140 \mbox{ ft of oil column}</math>
:<math>\mbox{h} = 200 \mbox{ psi} \times 0.7 = 140 \mbox{ ft of oil column}</math>
:<math>&=200 \mbox{ psi} \times 0.4 = 50 \mbox{ ft of gas column}</math>
:<math>\mbox{h} =200 \mbox{ psi} \times 0.4 = 50 \mbox{ ft of gas column}</math>
The minimum pore throat radius entered when S<sub>w</sub> is 20% and P<sub>c</sub> is [[pressure::200 psi]] is 0.5μ.
The minimum pore throat radius entered when S<sub>w</sub> is 20% and P<sub>c</sub> is [[pressure::200 psi]] is 0.5μ.